Idea
Reason
The capacity to think, argue, and understand. The Greeks believed it is what makes us most fully human.
For the Greeks, reason (nous or logos) was not merely useful but sacred. Aristotle called humans the rational animal. Plato placed reason at the top of the soul’s hierarchy. The Stoics identified it with the divine principle running through the cosmos. Even the pre-Socratics, by seeking natural explanations rather than mythological ones, were making a bet on reason. Philosophy itself is the practice of taking reason seriously.
